You have a Kubernetes cluster running on AWS. You want to configure a persistent volume claim (PVC) that uses an AWS EBS volume for storage. Which annotation can be used to specify the EBS volume type?
Correct Answer: C
The annotation •volume.beta.kubernetes.io/aws-ebs-volume-type• is used to specify the EBS volume type (e.g., 'gp2 , 701', 'standard') when using an AWS EBS volume for persistent storage. Option 'A' is used to specify the storage class for the PVC. Option 'B' specifies the storage provisioner, which is responsible for creating the volume. Option 'D' is used to specify the size of the EBS volume. Option 'E' is for specifying whether the EBS volume should be encrypted.
Question 102
You're running a Kubernetes cluster with several applications, and you want to analyze the performance of your applications at the Kubernetes cluster level. What are the key metrics you should monitor to gain insights into cluster-wide performance?
Correct Answer: B,C,D,E
The correct answers are B, C, D, and E . These metrics are crucial for understanding the overall performance of your Kubernetes cluster. B: Total CPU and memory usage across all nodes in the cluster. This metric helps you assess the overall resource consumption of your cluster. If the CPU or memory utilization consistently reaches high levels, it might indicate resource constraints, performance bottlenecks, or potential capacity planning issues. C: Number of failed deployments and pod restarts. This metric provides insights into the stability and reliability of your applications. Frequent deployment failures or pod restarts might indicate issues with application code, deployment configurations, or underlying infrastructure. D: Latency and throughput of requests to the Kubernetes API server. The Kubernetes API server handles all requests to manage the cluster. Monitoring API server latency and throughput can help identify performance bottlenecks and potential issues with cluster communication. E: Number of active Kubernetes controllers (e.g., Deployment, ReplicaSet). Kubernetes controllers are responsible for managing and maintaining the state of your applications. Tracking the number of active controllers can help you identify potential issues with controller activity, such as resource exhaustion or unexpected controller behavior. Option A is not as crucial for cluster-wide performance analysis. While knowing the number of pods running in each namespace might be useful for resource allocation, it doesn't directly reflect the overall performance of the cluster.
Question 103
You are running a containerized application on Kubernetes. You want to monitor the performance and health of your application and its containers effectively. Which of these open standards would you leverage?
Correct Answer: C
OpenTelemetry is a standard for collecting, processing, and exporting telemetry data (metrics, logs, and traces). It enables you to gain insights into the performance and health of your application and its containers within a Kubernetes environment, providing valuable information for troubleshooting and optimization.
